Every rule starts with an IF-statement. With this IF-statement you can select a certain part of your items based on whether these items apply to a certain condition. If you want to select all items, you can leave the IF-statement to "all". You can use this functionality as a filter: for example, as a quick check to see if a certain item is configured correctly. After using the If part of the rule to select items, hit 'Save rule' and you will see the statistics on the right hand side change. Click the 'Selected items' button on the right hand of your screen and you will see all items that are selected (and therefore affected) by this rule.
A common use for filtering is checking whether there are any items that failed to get affected by earlier rules (like a category field being empty). Another common use is adding a rule that selects all items and does nothing at the bottom of the rule chain: using the preview, you get a more clear overview of the final item data than the preview may give you.
See this page for common filters.
Do you want to know more about using the rules in Channable in the best and fastest way possible? Our online training platform, the Channacademy, gives you some tips and tricks and shows you various examples of rules that allow you to optimize your import data. Create your own Channacademy account in the Channable app. Using the other lessons, you can also start learning how to get your items into Channable and send them to an export channel of your choice!